Artificial intelligence technology and ultrasound-guided nerve block for analgesia in total knee arthroplasty

Table 1 Comparative of visual analogue scale scores (points, mean ± SD)

Group	2 h post-operation	4 h post-operation	12 h post-operation	24 h post-operation	48 h post-operation
Control group (n = 46)	3.1 ± 1.0	3.3 ± 0.3	3.7 ± 0.6	3.5 ± 1.0	3.2 ± 0.3
Research group (n = 46)	1.0 ± 0.4	1.3 ± 0.4	1.6 ± 0.8	1.2 ± 0.6	1.5 ± 0.4
T value	13.224	27.129	14.243	13.376	23.060
P value	< 0.05	< 0.05	< 0.05	< 0.05	< 0.05